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0. B. MAXS ON. SHEET DELIVERY APPARATUS FOR PRINTING MAGHINES. No.351,991;

Patented Nov. 2, -1886.

W-Ltwesses:

' N, PEI'ERS. Pnowmm nur, Withinglnn. n c

UNITED STATES PATENT OFFICE.

CHARLES B. MAXSO N, OF WESTERLY, RHODE ISLAND.

SHEET-DELIVERY APPARATUS FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 351,991, dated November2, 1886. Application filed December 29, 1885. Serial No. 187,048. (Nomodel.)

To all whom it may concern.-

Be it known that I, CHARLES B. MAXsoN, a citizen of the United States,residing at Westerly, in the county of Washington and State of RhodeIsland, have invented new and useful Improvements in Sheet-DeliveryApparatus for Printing-Machines, of which the following is aspecification.

The object of this invention is to produce an improved sheet-deliveryapparatus for printing presses, and especially cylinder-presses, wherebythe sheet may be delivered with its freshly-printed side upward andwithout be ing touched by any part of the apparatus.

This object I have accomplished, as herein after described, andillustrated in the accompanying drawings, in which Figure l is a sideelevation of the impression-cylinder of a printing-press constructedaccording to myinvention. Fig. 2 is a plan or top view of the same. Fig.3 is a sectional view of a portion of the impression-cylinder on alarger scale than the previous figures. Fig. 4 is a similar view of amodification.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates a portion of the press-frameconstructed to form the bearings for the impression-cylinder B and thesupport for the type-bed. (Not shown in' the drawings.) In a suitablecavity, D, of this cylinder are arranged the usual grippers, B forholding the sheet to be printed on the cylinder, those grippers beingopened and closed by trip-pins B acting on acain, B Fig. 2, mounted uponthe end of the grippershaft B The cylinder makes two revolutions duringa complete traverse of the bed in both directions,andito adapt thegrippers B to such motion of the cylinder the trippins B are alternatelythrown in and out of action by. a cam, B the whole constituting a pressof wellknown construction.

To raise the leading edge of the sheet from the cylinder after it hasbeen printed and released by the grippers,a series of sheet-lifters, L,are mounted on a rock-shaft, L, which has its bearings in the frame A.From the rockshaft extends a lever, L, which engages with a cam, L forimparting the proper motion to the sheet-litters. be seen that the cam Lis of such a form that By referring to Fig. 1 it will.

For the purpose of permitting the tips of the sheet-lifters to passwithout fail beneath the leading edge of the sheet, I have provided theclamping-support of the grippers B with recessesn. In the example shownin the drawings the clamping-support of the grippers is formed by thetympan-fingers N. These fingers are mounted on a shaft, N, extendingthrough the cavity D in the impression-cylin der, and they serve toclamp one end of the tympan-sheet N against the breast of thecavity,(see-Fig. 3,) being retained in their locking position by aspringlever, N?, which extends from the shaft N, and is retained by apin, N, projecting from the cylinder B. (See Figs. 1' and 2.) Theopposite end of the tympan-sheet is secured to a shaft, N which extendsthrough a cavity in the cylinder,and is retained in position by aratchet wheel and pawl, or by other suitable means, as commonlypracticed in printing-presses. The upper ends of the tympan-fingers Nare flush, or nearly so,with the surface of the cylinder, and they formthe sup port for the leading edge of the .sheet. The recesses n areinclined and correspond in position to the sheet-lifters L, so that asthe cylinder revolves toward them the tips of said sheet-lifters willslide up on' the inclined faces of the recesses and pass beneath theleading edge of the sheet. The tympan-fingers may, however, be reducedin length, so that they are inside the circumference of the cylinder andform no part of the support of the sheet. In this case the recesses nwill be made into the breast of the cavity D, and portions ofthetympan-sheet have to be cut away to permit the tips of the sheet-lifterstopass beneath the leading edge of the sheet. (See Fig. 4.)

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the impressioncylinder, thecylinder-grippers,and the clamping-support for the gripper-tips, ofsheet-liftersnmd ofrecesses formed inthe elamping-sup- In testimonywhereof I have hereunto set port, substantially as shown and described.my hand and seal in the presence of two sub- 2. The combination, withthe impressionscribing witnesses. cylinder, the cylindergrippers, andthe tym- CHARLES E. MAXSON. [In 8.] 5 pan-fingers N,exbending upflush,or nearly so, Witnesses:

with the cylinder of sheet-1ifters,and of re W'. HAUFF,

cesses formed in the tympau'fingers. E. F. KASTENI-IUBER.

